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Posted to common-issues@hadoop.apache.org by "Steve Loughran (Updated) (JIRA)" <ji...@apache.org> on 2012/03/06 16:39:58 UTC

[jira] [Updated] (HADOOP-3881) IPC client doesnt time out if far end handler hangs

     [ https://issues.apache.org/jira/browse/HADOOP-3881?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Steve Loughran updated HADOOP-3881:
-----------------------------------

    Affects Version/s: 1.0.0
    
> IPC client doesnt time out if far end handler hangs
> ---------------------------------------------------
>
>                 Key: HADOOP-3881
>                 URL: https://issues.apache.org/jira/browse/HADOOP-3881
>             Project: Hadoop Common
>          Issue Type: Bug
>          Components: ipc
>    Affects Versions: 1.0.0
>            Reporter: Steve Loughran
>            Priority: Minor
>
> This is what appears to be happening in some changes of mine that (inadventently) blocked JobTracker: if the client can connect to the far end and invoke an operation, the far end has forever to deal with the request: the client blocks too.
> Clearly the far end shouldn't do this; its a serious problem to address. but should the client hang? Should it not time out after some specifiable time and signal that the far end isn't processing requests in a timely manner? 
> (marked as minor as this shouldn't arise in day to day operation. but it should be easy to create a mock object to simulate this, and timeouts are considered useful in an IPC)

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